Improved performance in diketopyrrolopyrrole-based transistors with bilayer gate dielectrics

Ha, Tae-Jun, Sonar, Prashnant, & Dodabalapur, Ananth (2014) Improved performance in diketopyrrolopyrrole-based transistors with bilayer gate dielectrics. ACS Applied Materials and Interfaces, 6(5), pp. 3170-3175.

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There has been significant progress in the past 2 decades in the field of organic and polymer thin-film transistors. In this paper, we report a combination of stable materials, device architecture, and process conditions that resulted in a patterned gate, small channel length (<5 μm) device that possesses a scaled field-induced conductivity in air that is higher than any organic/polymer transistor reported thus far. The operating voltage is below 10 V; the on-off ratio is high; and the active materials are solution-processable. The semiconducting polymer is a new donor-acceptor polymer with furan-substituted diketopyrrolopyrrole and thienyl-vinylene-thienyl building blocks in the conjugated backbone. One of the major striking features of our work is that the patterned-gate device architecture is suitable for practical applications. We also propose a figure of merit to meaningfully compare polymer/organic transistor performance that takes into account mobility and operating voltage. With this figure of merit, we compare leading organic and polymer transistors that have been hitherto reported. The material and device architecture have shown very high mobility and low operating voltage for such short channel length (below 5 μm) organic/polymer transistors.

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11 citations in Scopus
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12 citations in Web of Science®

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ID Code: 75217
Item Type: Journal Article
Refereed: Yes
Keywords: bilayer gate dielectric, donor-acceptor polymer, figure of merit, low operating voltage, recessed gate, small channel length, Architecture, Conjugated polymers, Field effect transistors, Gate dielectrics, Polymeric films, Bi-layer, Donor-acceptor polymers, Figure of merits, Small channels, Transistors
DOI: 10.1021/am4043646
ISSN: 1944-8252
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2014 American Chemical Society.
Deposited On: 20 Oct 2014 23:35
Last Modified: 21 Oct 2014 20:49

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